NRP Madeira, PC-1257 as NRP Santiago, PC-809 as NRP Sal, PC-1256 as NRP São Tomé and PC-1259 as NRP São Vicente. Five were transferred to the Indonesian Navy in 1958 and 1960 under the Mutual Assistance Program. PC-1141 as KRI Tjakalang, PC-1183 as KRI Tenggiri, PC-581 as KRI Torani, PC-580 as KRI Hiu, and PC-787 as KRI Alu-Alu. Conversions Twenty-four PC-461s were converted to patrol gunboats, motor (PGM) and 35 were converted into amphibious control craft (PCC). Eighteen were completed as s (AM) but their performance as such was judged to be unsatisfactory and they were converted back to the PC configuration. Construction (all) (341) ... (36) ... (86) ... (50) ... (15) ... (31) ... (99) ... (24) ... (18) (see ) Defoe Shipbuilding Company, MI (56) ... ... ... ... Consolidated Shipbuilding, NY (51) ... ... ... ... ... ... ... ... Commercial Iron Works, OR (43) ... ... For ... , see Leathem D. Smith Shipbuilding, WI (42) , , ... ... ... ... ... ... George Lawley & Son, MA (23) ... ... ... Luders Marine Construction Company, CT (22) ... ... ... ... Albina Engine & Machine Works, OR (21) ... ... ... ... Dravo Corporation (20) Pittsburgh, Pennsylvania ... ... ... Wilmington, Delaware ... Sullivan Drydock and Repair Corporation, NY (16) , ... ... ... Gibbs Gas Engine Works, FL (14) ... ... Nashville Bridge Company, TN (14) ... ... , (see ) Brown Shipbuilding, TX (12) ... ... ... Jeffboat, IN (8) ... ... Engines 2 x 1,440bhp Fairbanks Morse 38D8 1/8 diesel engines, Westinghouse reduction gear (63) 461 ... 470, 483 ... 487, 563 ... 572, 578 ... 582, 600 ... 603, 616 ... 619 1077 ... 1082, 1176 ... 1180, 1231 ... 1236, 1251 .. 1254, 1260 ... 1263 (serial numbers listed in navsource.org reference) 2 x 1,440bhp General Motors 16-258S diesel engines, Farrel-Birmingham single reduction gear (88) 471 ... 482, 496, 542 ... 562, 583 ... 591, 596 ... 599, 604 ... 607, 620 ... 627 1119 ... 1139, 1225 ... 1230, 1241, 1242 serial numbers listed 2 x 1,440bhp Hooven-Owen-Rentschler R-99DA diesel engines, Westinghouse single reduction gear (111) 488 ... 495, 573 ... 577, 592 ... 595, 608 ... 615, 776 ... 789, 791 ... 795 799 ... 804, 807, 810, 813 ... 822, 825, 1181 ... 1184, 1186, 1187, 1190 .. 1217 1219 ... 1224, 1237 ... 1240,